https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97104
Bug ID: 97104 Summary: [11 Regression] aarch64, SVE: ICE in vect_get_loop_mask since r11-3070-g783dc66f9cc Product: gcc Version: 11.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: acoplan at gcc dot gnu.org Target Milestone: --- For the following testcase: int a, b, c, d; short e; void f() { unsigned g; for (; d; d++) { g = c == 0 ? 1 : b / c; e = a ? g : a; } } AArch64 GCC ICEs at -O1 or -O2 with -ftree-vectorize -march=armv8.2-a+sve since r11-3070-g783dc66f9ccb0019c3dad2701bb9110286758d70: commit 783dc66f9ccb0019c3dad2701bb9110286758d70 (HEAD) Author: Richard Biener <rguent...@suse.de> Date: Wed Sep 9 09:36:46 2020 enable live condition vectorization To reproduce: $ aarch64-none-elf-gcc -O2 -ftree-vectorize -march=armv8.2-a+sve test.c during GIMPLE pass: vect test.c: In function 'f': test.c:3:6: internal compiler error: in operator[], at vec.h:880 3 | void f() { | ^ 0x10637d9 vec<rgroup_controls, va_heap, vl_embed>::operator[](unsigned int) /home/alecop01/toolchain/src/gcc/gcc/vec.h:880 0x10637d9 vec<rgroup_controls, va_heap, vl_ptr>::operator[](unsigned int) /home/alecop01/toolchain/src/gcc/gcc/vec.h:1451 0x10637d9 vect_get_loop_mask(gimple_stmt_iterator*, auto_vec<rgroup_controls, 0ul>*, unsigned int, tree_node*, unsigned int) /home/alecop01/toolchain/src/gcc/gcc/tree-vect-loop.c:8487 0x1044e00 vectorizable_condition /home/alecop01/toolchain/src/gcc/gcc/tree-vect-stmts.c:10216 0x105a73e vect_transform_stmt(vec_info*, _stmt_vec_info*, gimple_stmt_iterator*, _slp_tree*, _slp_instance*) /home/alecop01/toolchain/src/gcc/gcc/tree-vect-stmts.c:10859 0x1061099 vect_transform_loop_stmt /home/alecop01/toolchain/src/gcc/gcc/tree-vect-loop.c:8700 0x107db5d vect_transform_loop(_loop_vec_info*, gimple*) /home/alecop01/toolchain/src/gcc/gcc/tree-vect-loop.c:9134 0x10a3c34 try_vectorize_loop_1 /home/alecop01/toolchain/src/gcc/gcc/tree-vectorizer.c:1094 0x10a43b6 try_vectorize_loop /home/alecop01/toolchain/src/gcc/gcc/tree-vectorizer.c:1151 0x10a46f0 vectorize_loops() /home/alecop01/toolchain/src/gcc/gcc/tree-vectorizer.c:1230 0xf392f7 execute /home/alecop01/toolchain/src/gcc/gcc/tree-ssa-loop.c:414 Please submit a full bug report, with preprocessed source if appropriate. Please include the complete backtrace with any bug report. See <https://gcc.gnu.org/bugs/> for instructions.